JPH0254044B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a seedling planting section that can be driven up and down with respect to a traveling machine body, in which a plurality of ground floats arranged in parallel in the lateral direction of the machine body are biased downward, and a shaft on the rear end side is biased downwardly. The seedling planting section is automatically adjusted based on the detection result of the height of the seedling planting section of the ground float relative to the seedling planting section so that the detection result is within a set range. The present invention relates to a structure for lifting and lowering the seedling planting section of a rice transplanter, which is equipped with a control mechanism for lifting and lowering the seedling planting section of a rice transplanter.

In the above-mentioned seedling planting section elevating and lowering operation structure, conventionally, all of the grounding floats are made to be able to swing up and down separately, and in order to enable each float to fully demonstrate its soil leveling function, the control mechanism is Only one of the grounding floats was a sensor float, and the seedling planting section was automatically raised and lowered based on the detection result of the sensor float's height relative to the seedling planting section. Therefore, elevation control is performed by detecting local irregularities that exist only in the area where the sensor float touches the ground, and the planting depth of the seedling planting device that corresponds to non-sensor floats is changed unevenly, causing the overall It had the disadvantage of being either shallowly planted or deeply planted.

As an example of a means to eliminate such drawbacks,
It is also possible to use the left and right end floats as independent sensor floats, and calculate the average of their detection results using an appropriate means. This requires a mechanism to transmit information to the elevation control mechanism, which has the disadvantage that the control mechanism becomes structurally complex.

In view of the above-mentioned circumstances, the present invention has been developed in such a way that the soil leveling function of each grounding float can be sufficiently demonstrated, and the control mechanism can be constructed with a simple structure. The purpose is to make it difficult for changes to occur.

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, a seedling planting section 5 is attached to a hydraulic cylinder 3 at the rear of a traveling vehicle having a pair of left and right front steering wheels 1, 1 and rear driving wheels 2, 2.
A riding rice transplanter capable of planting four rows is provided, which is capable of raising and lowering freely by a link mechanism 4 capable of vertically swinging operation, and is configured to transmit rotational power from the traveling body to the seedling planting section 5. It is configured.

2 parallel to the seedling planting section 5 in the lateral direction of the machine body.
Ground floats 6a and 6b are provided.
In each of the grounding floats 6a and 6b, as shown in FIGS. 2 and 3, a bracket 11 erected on the rear end side is attached to the transmission case 8 so as to be swingable up and down by a rotating shaft 12. The arm 13a or 13b which has been rotated is pivotally connected, and a spring 14 is applied to the rotating shaft 12 to urge both the arms 13a, 13b downward and to urge both the floats 6a, 6b downward integrally. Both of the grounding floats 6a and 6b are vertically swung separately around the axis P on the rear end side in a state in which they are biased downward by their own weight so as to separately level the ground at two rows of seedling planting locations. It is connected to the seedling planting section 5 by a rotating shaft 12 and both arms 13a and 13b so as to move up and down integrally with the seedling planting section 5 while being biased downward. That is, one arm 13
a and the other arm 13b are ground floats 6a,
By separately supporting the grounding floats 6b, the grounding floats 6a and 6b individually swing up and down around the axis P on the rear end side. And the rotation support shaft 12
supports the ground floats 6a, 6b via a pair of arms 13a, 13b, and also supports the shaft center P.
By rotating around an axis parallel to the axis, the pair of arms 13a and 13b
By arranging them so as to swing up and down to the same side as the floats rotate, the axis P of both grounding floats 6a and 6b moves up and down integrally with respect to the seedling planting section 5 in the same direction. be.

Control valve 1 of the fluid pressure cylinder 3
A swingable operating member 16 is attached to the control valve 5, and the control valve 1 is attached to the operating member 16.
5 is attached with a spring 17 that urges the seedling planting part in the raised position, and the other end of the operating wire 18, which is connected at one end to the operating member 16, is connected to both the ground floats 6a, 6b. is connected to the arm 19 extending from the rotary shaft 12 so that the inner wire 18a is slidably operated in cooperation with the spring 17 as the seedling planting section moves up and down, and is connected to the arm 19 extending from the rotating shaft 12. A control mechanism 20 is configured to automatically raise and lower the seedling planting section 5 based on the detection result of the height of the seedling planting section of the floats 6a and 6b so that the detection result is within a set range. .
That is, the control mechanism 20 controls the ground float 6 based on the rotation angle of the rotation support shaft 12 with respect to the transmission case 8.
The height of the seedling planting area of a and 6b is detected. When the height of the seedling planting portion of both grounding floats 6a, 6b is within the set range, both grounding floats 6a,
When the control valve 15 is maintained in the neutral position by the balance between the descending force of the spring 6b and the biasing force of the spring 17, and when the pair of transmission case 8 rises beyond the setting range of both grounding floats 6a and 6b, the control valve 15 is 17, the seedling planting part is moved to the raised position, and both grounding floats 6a and 6b exceed the set range and the transmission case 8
When lowered, the control valve 15 is operated to the seedling planting portion lowering position by the lowering force of both grounding floats 6a, 6b.

Therefore, regardless of changes in the depth of the plow or changes in the mud surface in the direction of movement of the machine and in the lateral direction of the machine, the height of the seedling planting section 5 relative to the mud soil is maintained within the set range, and the depth of the seedling planting section is maintained. It is designed so that you can work while keeping the height almost constant.

The operating lever 21 shown in FIG. 2 is used to change and set the planting depth to be maintained by changing the distance between the outer wire 18b of the operating wire 18 and the arm 19.

In addition, in the case of a 5-row or 6-row rice transplanter with 3 ground floats installed in parallel, only the 2 ground floats located on the left and right sides, or all the ground floats, can be used for seedling planting. It is also possible to implement a configuration in which the height of these grounding floats relative to seedling planting is detected by connecting the floats so as to move up and down integrally with the floats.

In summary, the present invention provides a structure for raising and lowering the seedling planting part of the rice transplanter described above, in which one rotational shaft 12 supporting at least two of the grounding floats 6a and 6b is arranged parallel to the axis P. A plurality of arms 13 are provided to be rotatable around the axis, and respectively support the ground floats 6a and 6b so as to be rotatable around the axis P.
a, 13b are provided integrally and rotatably on the rotational support shaft 12, and as the rotational support shaft 12 rotates, the arms 13a, 13b swing up and down in the same direction, so that the axis P is The arms 13a, 13b are arranged to move up and down with respect to the seedling planting section 5, and the control mechanism 20 controls the grounding floats 6a, 6.
The present invention is characterized in that it is a mechanism for detecting the height of the seedling planting part b based on the rotation angle of the rotational support shaft 12.
The functions and effects thereof are as follows.

At least two ground floats 6a, 6b are connected by the rotation support shaft 12 and the arms 13a, 13b so that they can each swing up and down separately, but can also go up and down together, and can go up and down in conjunction only in the same direction. be done.

As the grounding floats 6a and 6b move up and down in conjunction with each other, the rotation support shaft 12 rotates, and the elevation control mechanism 20 detects the rotation angle of the rotation support shaft 12 and performs predetermined control. Therefore, the ground floats 6a, 6b
The plurality of grounding floats 6a and 6b serve as sensor floats, while each of the grounding floats 6a and 6b individually swings up and down to level the ground. Moreover, even if, for example, there is local unevenness in the left-right direction of the aircraft, and one of the grounding floats 6a or 6b as a sensor tries to rise or fall, the displacement will be caused by the displacement of the other float 6b.
or 6a, and furthermore, the lifting force of one earthing float 6a or 6b is not transmitted as a descending force to the other earthing float 6b or 6b as in the case of a balance type connection. Defects are less likely to occur, and the influence of local unevenness is reduced by simply detecting the rotation angle of the rotary support shaft 12 as the float height without having to average the detection results by the plurality of floats 6a and 6b. Stable elevation control will now be performed. Eventually, it became possible to align the planting depth with extremely high precision, both because the soil was leveled reliably and because the elevation control was performed accurately. Moreover, it can be obtained relatively inexpensively.

[Brief explanation of drawings]

The drawings show an embodiment of the elevating and lowering operation structure for the seedling planting part of the rice transplanter according to the present invention, in which Fig. 1 is a side view of the riding rice transplanter, Fig. 2 is a side view of the elevating control mechanism, and Fig. 3 is a grounding float. It is a perspective view of an attachment part. 5...Seedling planting part, 6a, 6b...Grounding float, 1
2...Rotation shaft, 13a, 13b...Arm, 20...
Control mechanism, P... shaft core.

Claims (1)

[Claims] 1. Seedling planting section 5 that can be driven up and down with respect to the traveling machine body.
A plurality of grounding floats 6a, 6b arranged in parallel in the lateral direction of the aircraft body are provided in a state in which they are biased downward and each swings up and down around the axis P on the rear end side, and the grounding floats 6a, 6b are Seedling planting using a rice transplanter equipped with a control mechanism 20 that automatically raises and lowers the seedling planting section 5 based on the detection result of the height of the seedling planting section so that the detection result is within a set range. 1, which has a vertical lifting operation structure, wherein one rotary shaft 12 supporting at least two of the ground floats 6a, 6b is rotatably provided around an axis parallel to the axis P, and the ground floats 6a, 6b are rotatably provided. a plurality of arms 13 each rotatably supporting the 6b around the axis P;
a, 13b are integrally and rotatably provided on the rotational support shaft 12, and as the rotational support shaft 12 rotates, the arms 13a, 13b swing up and down in the same direction, so that the axis P is The arms 13a and 13b are arranged to move up and down with respect to the seedling planting section 5, and the control mechanism 20 controls the grounding floats 6a and 6.
A structure for lifting and lowering a seedling planting part of a rice transplanter, which is a mechanism for detecting the height of the seedling planting part in b based on the rotation angle of the rotational support shaft 12. 2. Two of the ground floats 6a and 6b are provided,
The structure according to claim 1, characterized in that both of these floats 6a and 6b are connected to the seedling planting section 5 in such a manner that they can be raised and lowered integrally.